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Nexperia USA Inc. 1PS79SB31-QF
- Part No.:
- 1PS79SB31-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
1PS79SB31-QF.pdf
- Description:
- DIODE SCHOTTKY 30V 200MA SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,154
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Product details
Overview
1PS79SB31-Q from Nexperia is a planar Schottky barrier diode in SOD523 (SC-79) package, rated for 30 V reverse voltage, 200 mA forward current, and 255–300 mV forward voltage at 10 mA/25 °C. It serves as a low-loss rectifier or clamping device in space-constrained automotive and portable electronics.
For engineers reviewing the 1PS79SB31-Q datasheet, 1PS79SB31-Q pinout, 1PS79SB31-Q application, or 1PS79SB31-Q equivalent, key selection criteria include ultra-low VF at low currents, AEC-Q101 qualification, SOD523 footprint compatibility, and thermal resistance of 450 K/W on FR4 PCB.
Technical Context
This discrete Schottky diode uses a guard ring structure to enhance reverse breakdown robustness and reduce leakage. Its planar junction design enables stable low-VF performance across temperature (130–500 mV from 0.1 mA to 200 mA at 25 °C).
Qualified per AEC-Q101, it supports automotive ambient ranges (−65 °C to +125 °C) and withstands 1 A non-repetitive peak forward surge (8.3 ms half-sine). Diode capacitance is 20–25 pF at 1 V/1 MHz, supporting high-speed switching up to ~100 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 30 V - Maximum DC blocking capability without breakdown |
| Forward Current (IF) | 200 mA - Continuous DC conduction limit at Tamb ≤ 125 °C |
| Forward Voltage (VF) | 255–300 mV @ 10 mA/25 °C - Enables <0.3 V drop in low-power biasing and clamping |
| Reverse Current (IR) | ≤30 µA @ 10 V/25 °C - Low leakage preserves battery life in always-on circuits |
| Diode Capacitance (Cd) | 20–25 pF @ 1 V/1 MHz - Supports fast edge response in ESD protection and RF detection |
| Junction Temp (Tj) | 125 °C max - Defines maximum operating junction temperature under derated conditions |
| Thermal Resistance (Rth(j-a)) | 450 K/W - On standard FR4 PCB; dictates power dissipation limit (~111 mW at ΔT = 50 K) |
Pinout & Package
SOD523 (SC-79) ultra-small surface-mount plastic package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead, single-sided copper PCB mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Negative terminal; marked by cathode bar; connects to lower-potential node in rectification/clamping |
| 2 | Anode (A) | Positive terminal; accepts input current; polarity-sensitive placement required for correct bias |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low forward voltage | 255–300 mV @ 10 mA enables >90% efficiency in 3.3 V rail clamping and 1.8 V logic protection |
| AEC-Q101 qualification | Stress-tested for automotive use - validated for −65 °C to +125 °C operation and mechanical shock |
| Guard ring protection | Improves edge termination reliability and reduces IR drift under high VR stress |
| SOD523 footprint | 0.8 mm width allows dense layout in wearables, TWS earbuds, and ADAS sensor modules |
Applications
| Automotive Body Control Module | USB-C Port Protection |
|---|---|
Use Scenario: Reverse polarity and ESD transient suppression on 12 V LIN bus lines. IC Role / Device Role / Timing Role: Discrete Schottky clamp placed between line and ground to shunt transients below 30 V. Use Value: 30 µA IR at 10 V ensures minimal standby drain; 25 pF Cd avoids signal integrity degradation on 20 kbps LIN. | Use Scenario: VBUS overvoltage clamping and CC line ESD protection in compact USB-C receptacles. IC Role / Device Role / Timing Role: Bidirectional low-capacitance clamp integrated adjacent to Type-C connector pins. Use Value: 20–25 pF capacitance prevents USB 2.0 data eye distortion; SOD523 fits within 1.5 mm board edge keep-out. |
| Wireless Earbud Battery Management | Industrial Sensor Node Power Rail |
Use Scenario: Reverse-battery protection and low-drop rectification in coin-cell powered charging path. IC Role / Device Role / Timing Role: Series-connected Schottky preventing discharge during battery swap; forward-biased during charge. Use Value: 255 mV VF at 1 mA minimizes voltage loss in sub-100 µA quiescent paths, extending runtime by >8% vs. standard diodes. | Use Scenario: Input rail decoupling and transient suppression for 3.3 V MCU supply in vibration-prone factory nodes. IC Role / Device Role / Timing Role: Parallel-mounted clamp across LDO input to absorb 100 ns spikes from relay coil back-EMF. Use Value: 1 A IFSM rating handles 8.3 ms surges without failure; AEC-Q101 grade ensures field reliability beyond industrial temp specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSR0230HT1G | Same SOD-523 package; VF = 270–320 mV @ 10 mA; IR = 50 µA @ 10 V | Higher IR increases standby loss in battery-critical designs | Prefer when cost sensitivity outweighs leakage requirements |
| Vishay VSKY130L | SOD-323 package (1.7 × 1.25 mm); VF = 290–340 mV @ 10 mA; VR = 30 V | Larger footprint limits use in ultra-dense layouts like TWS earbuds | Select only if existing SOD-323 land pattern must be reused |
Compared with NSR0230HT1G and VSKY130L, the 1PS79SB31-Q delivers the lowest combined VF/IR trade-off in SOD523, making it optimal for space- and leakage-constrained automotive and portable applications where footprint and efficiency are co-prioritized.
Availability
1PS79SB31-Q is available at Aetrix Electronics and suitable for automotive body control modules, USB-C interface protection, wireless earbud power management, and industrial sensor node designs requiring stable component supply and AEC-Q101 compliance.
Supply support for 1PS79SB31-Q includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The 1PS79SB31-Q belongs to Nexperia's AEC-Q101-qualified Schottky diode portfolio, engineered specifically for low-VF, low-leakage, and ultra-compact applications in automotive infotainment, ADAS sensors, and portable electronics.
FAQ
Is the 1PS79SB31-Q suitable for bidirectional ESD protection?
No - it is a unidirectional Schottky diode optimized for forward conduction and reverse blocking. For bidirectional ESD clamping, a dedicated TVS diode such as PESD5V0S1BA should be used. The 1PS79SB31-Q provides effective unidirectional clamping only when anode is biased positive relative to cathode.
What is the meaning of the 'G3' marking on the device?
The 'G3' marking is the manufacturer-specific top-side code for the 1PS79SB31-Q, per Table 4 of the datasheet. It identifies the device variant and batch; it does not encode date code or package version. The cathode is indicated by the bar adjacent to pin 1.
Can this diode replace a standard silicon diode in a 5 V rail clamp?
Yes - its 30 V VR rating and 255–300 mV VF at 10 mA make it superior to standard silicon diodes (VF ≈ 600–700 mV) in 5 V clamping, reducing power loss by >50% and improving thermal margin. Ensure layout respects SOD523 thermal pad limitations and avoids excessive trace inductance.
Does the 450 K/W Rth(j-a) apply to reflow-soldered assemblies?
Yes - the 450 K/W value is measured on a standard FR4 PCB with single-sided 1 oz copper and the recommended SC-79 solder footprint (Fig. 5), using JEDEC JESD51-2 compliant test conditions. Performance degrades to ~600 K/W on 0.5 oz copper or no thermal relief, requiring derating.
1PS79SB31-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 30 µA @ 10 V
- Capacitance @ Vr, F:
- 25pF @ 1V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- 125°C
1PS79SB31-QF FAQ
1.How can I place an order for 1PS79SB31-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PS79SB31-QF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1PS79SB31-QF reliable?
The price and inventory of 1PS79SB31-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PS79SB31-QF is usually 5 days.
3.What payment methods are accepted for 1PS79SB31-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PS79SB31-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PS79SB31-QF?
1PS79SB31-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PS79SB31-QF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1PS79SB31-QF?
For technical support, including 1PS79SB31-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PS79SB31-QF requirements.
6.How does Aetrix verify that 1PS79SB31-QF is sourced from the original manufacturer or authorized distributors?
All 1PS79SB31-QF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1PS79SB31-QF meets industry standards.
7.What is the process for return or replacement of 1PS79SB31-QF?
All 1PS79SB31-QF units undergo pre-shipment inspection (PSI). If there is an issue with 1PS79SB31-QF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1PS79SB31-QF part is unused and in its original packaging.
Return procedure for 1PS79SB31-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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